<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<button id="btn" onclick="haiask()">点击</button>
	</body>
	<script>
		function haiask(){
			// alert("恭喜发财")
			// confirm("无法打开")
			prompt("")
		}
	</script>
</html>